Patching Oracle Linux against CVE-2023-48795 Vulnerability on Air-Gapped Servers

Posted on by Ahmed Abdel Fattah

We’ve all been there. That email from the security team lands in your inbox, or a routine scan flags a new, critical vulnerability. This time, it’s CVE-2023-48795, also known as the "SSH Terrapin Prefix Truncation Weakness." It sounds intimidating, and the thought of a man-in-the-middle attack. For many, the fix is straightforward. But what if … Continue reading Patching Oracle Linux against CVE-2023-48795 Vulnerability on Air-Gapped Servers

How to change the hostname for an OCI Compute Instance

Posted on by Ahmed Abdel Fattah

Following are the steps that I followed to change the hostname of one OCI Compute Instance for one of my clients. Note that the operating system for this instance is Oracle Linux: 1. Use the hostnamectl utility to change the hostname hostnamectl set-hostname new_hostname 2. Update the /etc/hosts file with the new name [root@infodqmdm001 ~]# … Continue reading How to change the hostname for an OCI Compute Instance

Find the largest Top 10 Files and Directories on Linux/Unix

Posted on by Ahmed Abdel Fattah

To find the top 10 files and directories in the current directory, we will use the "du" command with some options, along with the "sort" command to list the sizes in descending order, along with the "head" command to get only the top 10 items. Example:(output in K Bytes) Note the following "du" command options:-c … Continue reading Find the largest Top 10 Files and Directories on Linux/Unix

Oracle Database 19c is now Available

Posted on by Ahmed Abdel Fattah

Oracle Database 19c is now available for Linux x86-64. To download the software:https://www.oracle.com/technetwork/database/enterprise-edition/downloads/index.html Also, the documentation is available at: https://docs.oracle.com/en/database/oracle/oracle-database/19/books.html Enjoy ! ThanksAhmed